Help with Calculating Projection of consumption based on Historical consumption

[Odyssey]

Requirement:

I have a requirement to  do a calculation that will inform our client what their consumption  should be based on historical   consumption. The Business user   requested that I   do a linear  regression calculation and provide a  single value which would be considered as a  projected consumption amount for  year 1 and another as projected consumption for year 2. 

This would be based on fields. Totalusage, Username,  YearMonth. The result should be presented as a single value only for  year 1 and a single value for  year 2. So end of 2024 and end of 2025. 

There should be a seaparate projection for  each  client. 

I am not so sure how to go about doing this. There will be no  visual, just a  projected  value entered in a table. I would appreciate   any help to solve this.

Tables: Date( Date, Year-Month), Usage: ( Total Used), Clients( Clientname)

[lbendlin]

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